Revert of Change ComputedStyle::setUnique to take bool parameter.

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
@@ skipping 718 matching lines @@
 
     if (element->computedStyle() &&
         element->computedStyle()->textAutosizingMultiplier() !=
             state.style()->textAutosizingMultiplier()) {
       // Preserve the text autosizing multiplier on style recalc. Autosizer will
       // update it during layout if needed.
       // NOTE: this must occur before applyMatchedProperties for correct
       // computation of font-relative lengths.
       state.style()->setTextAutosizingMultiplier(
           element->computedStyle()->textAutosizingMultiplier());
-      state.style()->setUnique(true);
+      state.style()->setUnique();
     }
 
     if (state.hasDirAutoAttribute())
       state.style()->setSelfOrAncestorHasDirAutoAttribute(true);
 
     applyMatchedPropertiesAndCustomPropertyAnimations(
         state, collector.matchedResult(), element);
     applyCallbackSelectors(state);
 
     // Cache our original display.
@@ skipping 1183 matching lines @@
 
 DEFINE_TRACE(StyleResolver) {
   visitor->trace(m_matchedPropertiesCache);
   visitor->trace(m_selectorFilter);
   visitor->trace(m_styleSharingLists);
   visitor->trace(m_document);
   visitor->trace(m_tracker);
 }
 
 }  // namespace blink